[INFO] cloning repository https://github.com/VitalyAnkh/learn_error_handling
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/VitalyAnkh/learn_error_handling" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVitalyAnkh%2Flearn_error_handling", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVitalyAnkh%2Flearn_error_handling'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a9cf67b08bbfba5b416953d982e1a8eada6ad2f8
[INFO] documenting VitalyAnkh/learn_error_handling against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVitalyAnkh%2Flearn_error_handling" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/VitalyAnkh/learn_error_handling on toolchain 394e1b40d264aa6928811919c1124fa248e7d802
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/VitalyAnkh/learn_error_handling
[INFO] finished tweaking git repo https://github.com/VitalyAnkh/learn_error_handling
[INFO] tweaked toml for git repo https://github.com/VitalyAnkh/learn_error_handling written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/VitalyAnkh/learn_error_handling already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cf23f908555e1ac6c222a2ab2c43aa2bca8c9fb83f0b24ce4764d0548f1319be
[INFO] running `Command { std: "docker" "start" "-a" "cf23f908555e1ac6c222a2ab2c43aa2bca8c9fb83f0b24ce4764d0548f1319be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf23f908555e1ac6c222a2ab2c43aa2bca8c9fb83f0b24ce4764d0548f1319be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf23f908555e1ac6c222a2ab2c43aa2bca8c9fb83f0b24ce4764d0548f1319be", kill_on_drop: false }`
[INFO] [stdout] cf23f908555e1ac6c222a2ab2c43aa2bca8c9fb83f0b24ce4764d0548f1319be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ccecf4a746e27fa0811860905b191de83d2b2edd996637f81dabf23be236f31f
[INFO] running `Command { std: "docker" "start" "-a" "ccecf4a746e27fa0811860905b191de83d2b2edd996637f81dabf23be236f31f", kill_on_drop: false }`
[INFO] [stderr]  Documenting learn_error_handling v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `Command { std: "docker" "inspect" "ccecf4a746e27fa0811860905b191de83d2b2edd996637f81dabf23be236f31f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ccecf4a746e27fa0811860905b191de83d2b2edd996637f81dabf23be236f31f", kill_on_drop: false }`
[INFO] [stdout] ccecf4a746e27fa0811860905b191de83d2b2edd996637f81dabf23be236f31f